Sonia Singhal provides an overview of how to design a product roadmap. She explains that a roadmap is an executable plan that outlines why an organization needs the roadmap, what will be built, and when. To build an effective data-driven roadmap, she recommends gathering inputs from customers, stakeholders, and operational data to understand user needs and align with business objectives. Themes and technical feasibility should then be considered to prioritize initiatives based on customer impact, business impact, and effort involved. The roadmap should be communicated, collaborated on, and iterated based on measuring results from A/B tests.